The rise and fall of ancient walruses, and how modern ones got their tusks, is a story that spans almost 20 million years. And while there are parts of the story that we’re still trying to figure out, it looks like tusks didn’t have anything to do with how or what these animals ate.
| Creator | Hank Green |
|---|---|
| Actor | Kallie Moore, Blake de Pastino, Michelle Barboza-Ramirez |
| Country | United States of America |
| Production | PBS Digital Studios |
| Season 0(6 episode) |
|---|
| Season 1(24 episode) |
| Season 2(45 episode) |
| Season 3(39 episode) |
| Season 4(39 episode) |
| Season 5(31 episode) |
| Season 6(68 episode) |
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